1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b626e50e93f319f860e5ffda9ec04995411a173de70808bf7777834c213c59. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6cf9c50-6575-48f3-a37d-8fa70bb562b6.json and https://artists.proofprofile.net/proofs/artist/c6cf9c50-6575-48f3-a37d-8fa70bb562b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86adb68001b79fc3a7f0b714d68886fe24b561ab2e81008fe30fc1643ddc6cc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2408531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362872ed956575f957ff1cf5c5caa5d05b87d4bd9266cf47989e69291149f2d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2435777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362872ed956575f957ff1cf5c5caa5d05b87d4bd9266cf47989e69291149f2d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2435777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd4b14edd8e207ea6216661a323cc001c32fc8b34fc0b3c329811589bc88382. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWV32429875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288a84087b8ac705b2907779fc44398c045e65c8598f9cc9f4b0e775b3df25c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWV32432307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf65373a1b2efa39d97041d8d57a07910273649ffc2aa461cd37f52dec3ab10. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWV32433340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7081e57bfa73768d59fbf4b78777aa5512b31c0117e8734d28f4eb04eae126aa. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ8A2463510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93f695c45d246e06836d8a12298fc837dc739cefcbe7b512b2b52b4aa621e21. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ8B2476483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93f695c45d246e06836d8a12298fc837dc739cefcbe7b512b2b52b4aa621e21. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ8B2476483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae0d5a3b0fbdaea4e868fa9be966470d39d3e243dcf3756199d267ef8782f7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82542439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf352c00fc96c2e1af2db11920db321e2484977df1c36958a6ef32714c3090bdf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92550733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e962fb399b0bebd00baedacbe243ab9c272a26d36c67200b698555373fad30. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2598057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578e8da870d623aaf544feef8f321de43f293cfcb34271d78fcf19c0ae8101b1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2549110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dc4247517d2ee4904bea25bc4eb175da8036608ac4b9ad909574260a36ac83. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2545208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f8d2aca317192b71987170820734b75f74706aba3e5d4ffebf79ad998bfbd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2596315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e962fb399b0bebd00baedacbe243ab9c272a26d36c67200b698555373fad30. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2598057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b59f0893f0ee8c712d2433d6579947f2e682718272ed73ed71db712c1a79f3e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2547137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb7949520a020586ffb956e145368fc38f6edd1810baba5d1a158476166de93. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2509240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c340cfe57cfa0c5cb7699e9755bbfdca9a57762edd5490b3000984a6afc988. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2511646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573e75e32bdfaecddfbf1875ebc208fd946278c6a88a382f2e2df0025315daa0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2511676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fe7f21c1eddd29090826d45bf8ec4aaf66b7ec1e72b59b625cbcde6210e33c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:36:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52552299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9f6415490ffd2aa40a67fb91fec3fdaea0c4b91d3c44ec591a04c4fd0ecdea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBB2503508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380fef565133379e6002fcb994f2e17b521c8c6622796b8b57263b6ee9f4bf07. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:06:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES75E2508415.